QBFS · Construction Consultancy and Forensic Building Services for Australian Builders

QBFS gives Australian builders and head contractors a single point of construction consultancy across the project life cycle. From inspection regimes that catch defects before they compound, to forensic reports after a project finishes, the work is run by Paul Marko with decades inside the build.

Welcome to QBFS

Why builders bring QBFS in

Most projects don't fail because the headline trade made a mistake. They fail in the gaps. A change order that didn't flow to the inspection plan. A sub-contractor who interpreted the spec their own way. Waterproofing that passed a glance but not a test. After handover those gaps get expensive fast, and once a claim opens, the engineering report is the difference between recovery and a long fight.

QBFS works in those gaps. As a construction consultant operating across Australia, the focus is on getting the inspection regime right before problems multiply, then bringing a forensic-grade approach when something has gone wrong. Reports are written so a builder can act on them, a developer can fund them, and a lawyer can lean on them.

Three things you can count on:

  • ITPs that match how the job is actually built, not a template.
  • Sub-contractor audits that test work against spec, on site, in writing.
  • Defect investigations that name the cause, the party, and the fix.
The WOrk

What QBFS does

Audience

Who QBFS works with

The core audience is builders and head contractors managing real construction risk. QBFS is the consultant you bring in when a missed defect costs serious money, or the quality regime has to be defensible.


Developers and asset owners use the post-completion defects service for independent reads on cause and rectification after handover. Legal teams use the expert-witness service for matters involving building defects, contract performance, or non-conformance disputes.

The service area is Australia-wide. Brisbane, Sydney, Melbourne, Perth, Adelaide, or regional, the methodology travels.

Start With a Call

Tell Paul the project. The next step gets sorted on the call.

Best way to start is a phone call. Tell Paul the project, the issue, where you sit in the build cycle. The next step gets sorted on the call: site visit, desktop review, or a referral if QBFS isn't the right fit.
Frequently Asked Questions

Common questions, answered.

  • What does QBFS do?

    QBFS is a construction consultancy and forensic building services firm. The work covers two arcs: protecting active projects with inspection test plans, QA programs, sub-contractor audits, and ongoing on-site support; and resolving issues after handover with post-completion defect investigations and expert-witness reports. The common thread is evidence-grade rigour delivered in language a builder can act on.

  • When should a builder bring QBFS in on a project?

    Earliest is best. Bringing QBFS in at the ITP and QA setup stage means the quality regime matches how the project actually runs, and trades have a clear standard from day one. Mid-build still works, especially when a builder needs a second opinion on a contentious area. Post-handover, QBFS handles defect investigations and expert-witness work.

  • What is the difference between an ITP and a sub-contractor audit?

    An Inspection Test Plan is a document that says what gets checked, when, by whom, against which standard or specification. A sub-contractor audit is a site activity that tests whether the trade’s work matches what the ITP and the contract require. The ITP is the rulebook; the audit is the inspection that runs against the rules. QBFS develops both, and runs the audits where requested.

  • Can QBFS act as an expert witness?

    Yes. QBFS handles expert-witness work in building defects matters and construction-quality disputes. Reports follow the relevant court and expert-witness codes of conduct, with clear evidence-of-cause analysis, NCC and Australian Standards references, and proposed rectification paths. Paul has produced reports used in determination and litigation.

  • What does a post-completion defect investigation cover?

    A post-completion defect investigation starts with the project documents and the defect notification, then moves to a site inspection. The output is a written report identifying the defect, the probable cause, the responsible party where evidence supports a view, and the rectification approach. Where testing is needed, that’s commissioned with appropriately accredited labs and consultants and reported alongside the inspection findings.

  • Are QBFS services available across Australia?

    Yes. QBFS works as a construction consultant across Australia, with site work coordinated wherever the project sits. Most engagements involve a mix of desktop review and site attendance, and travel is built into the engagement scope where it’s needed. The methodology and reporting standard don’t change between states.

  • How do I engage QBFS?

    Call Paul on 0407 146 737. Explain the project and the issue. The next step gets sorted on the call: scope, fee proposal, start date. For larger engagements, a brief site visit or document review informs the scope before the formal proposal goes out.

Construction consultancy and forensic building services for Australian builders, head contractors, developers, and legal teams.

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